SAN ANTONIO – Air Force Airman 1st Class David A. Christianson graduated from basic military training at Joint Base San Antonio-Lackland, San Antonio, Texas.

The airman completed an intensive, eight-week program that included training in military discipline and studies, Air Force core values, physical fitness, and basic warfare principles and skills.

Airmen who complete basic training earn four credits toward an associate in applied science degree through the Community College of the Air Force.

Christianson is the son of Helga T. Christianson of Nice, Calif. He is also the brother of Jon J. Karlsson.

The airman graduated in 2012 from Upper Lake Union High School, Upper Lake, Calif.